``` `padding: 0.875rem` maps to `py-3.5`, `font-size: 12px` maps to `text-xs`, nested `&:hover` becomes `hover:` variants, and `min-width: 768px` becomes the `md:` prefix. ## Using a Custom Tailwind Config The config panel in the bottom-right accepts standard Tailwind JSON. Without it, the tool uses the default Tailwind theme and falls back to arbitrary value syntax (`w-[750px]`) for values with no built-in class. Adding your project config affects three things: - **Custom colors**: `colors["brand-blue"]["600"]: "#1e40af"` makes that hex convert to `text-brand-blue-600` instead of `text-[#1e40af]` - **Custom breakpoints**: `screens["tablet"]: { min: "640px", max: "1023px" }` makes the corresponding media query convert to `tablet:` prefix - **@supports**: `supports["grid"]: "display: grid"` makes `@supports (display: grid)` convert to `supports-grid:` ## What Will Not Convert Cleanly ### Generates arbitrary value syntax - `calc()` expressions like `width: calc(100% - 2rem)` - `var()` CSS variable references - Non-standard values like `padding: 7px` (no matching Tailwind step) - Complex filter function chains ### Needs manual handling - `@keyframes` animation definitions - Browser prefixes ( `-webkit-`, `-moz-`) - CSS Grid named areas ( `grid-template-areas`) - Custom property declarations ( `:root { --var: value }`) ## The rem Baseline Matters The tool converts rem values using `1rem = 16px` as the fixed baseline. If your project sets a different root font size — for example `html { font-size: 62.5% }` making `1rem = 10px` — the converted class names will be off. Adjust the `remInPx` field in the config panel to match your project's actual root font size. Review output before committing Auto-conversion may map a value to the nearest Tailwind step, which can differ by a pixel or two from the original. Verify the result visually against your design before merging. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: CSS to Tailwind · Z.Tools](https://z.tools/t/css-to-tailwind) --- --- title: Date Format Converter · Z.Tools description: Convert between Unix timestamp, ISO 8601, RFC, MongoDB ObjectId, and more url: https://z.tools/t/date-converter.md site_name: Z.Tools site_url: https://z.tools file: /t/date-converter.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Date Format Converter · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Date Format Converter The date format converter accepts any date string or timestamp as input and instantly shows the equivalent value in 10 common formats side by side: Unix timestamp, ISO 8601, RFC 3339, RFC 7231, UTC, ISO 9075, MongoDB ObjectId, Excel serial number, JavaScript timestamp, and a custom format you define. It is the quickest way to reconcile date format mismatches across databases, APIs, or systems. ## Which Format Belongs Where | Format | Example | Typical use | | --- | --- | --- | | ISO 8601 | `2024-12-19T10:30:45.123Z` | JSON APIs, database storage, internationalized apps | | ISO 9075 | `2024-12-19 10:30:45.123` | MySQL, PostgreSQL queries | | RFC 3339 | `2024-12-19T10:30:45+08:00` | Internet protocols, OpenAPI specs | | RFC 7231 | `Thu, 19 Dec 2024 10:30:45 GMT` | HTTP headers: Last-Modified, Expires | | Unix timestamp (seconds) | `1703038245` | System logs, cache TTL, token expiry | | JavaScript timestamp (ms) | `1703038245123` | `Date.now()`, frontend time comparisons | | MongoDB ObjectId | `675436e50000000000000000` | Reverse-looking up document creation time | | Excel serial number | `45644.4378` | Excel import/export, financial reports | ## Timezone Edge Cases The tool parses input using dayjs, so timezone behavior depends on the format: - **ISO 8601 / RFC 3339**: If the input carries a timezone offset like `+08:00` or `Z`, dayjs preserves it and the RFC 3339 output includes the correct offset. - **Locale format**: Uses the browser's current system timezone. The same input will produce different "local" strings on machines set to different timezones. - **ISO 9075 / RFC 7231**: Formatted in local timezone — note this when sharing results across timezone boundaries. - **Unix timestamp / UTC**: Always UTC, no timezone ambiguity. These two are the safest formats for passing time between systems. **Daylight saving time boundaries**: If an input time falls exactly on a DST transition (such as the 2:00 AM changeover in European/American autumn), some output formats may show a repeated or skipped hour. This reflects standard timezone behavior, not a bug. ## Extracting Creation Time from a MongoDB ObjectId The first 8 hex characters of an ObjectId encode a Unix timestamp in seconds. The tool extracts those 8 characters and appends 16 zeros to produce a valid-looking 24-character ObjectId. The reverse is also supported: paste a real ObjectId and the tool derives the document's creation time from the first 8 characters. ## Custom Format Syntax The custom format field accepts dayjs format tokens. Common tokens: - `YYYY` — four-digit year; `YY` — two-digit - `MM` — month (01–12); `M` — without leading zero - `DD` — day (01–31); `D` — without leading zero - `HH` — 24-hour; `hh` — 12-hour; `mm` — minutes; `ss` — seconds - `X` — Unix seconds; `x` — Unix milliseconds Mixing up `MM` (month) with `mm` (minutes) or `HH` (24-hour) with `hh` (12-hour) is the most common reason a custom pattern produces unexpected output. Excel serial number and the 1900 leap-year bug Excel incorrectly treated 1900 as a leap year, inserting a phantom 1900-02-29. This shifts all serial numbers by one for dates before 1900-03-01. The tool matches Excel's behavior using the formula timestamp / 86400000 + 25569, but this format is unreliable for historical dates before 1900. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Date Format Converter · Z.Tools](https://z.tools/t/date-converter) --- --- title: Code Diff Viewer · Z.Tools description: Compare code and text with syntax highlighting url: https://z.tools/t/diff-viewer.md site_name: Z.Tools site_url: https://z.tools file: /t/diff-viewer.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Code Diff Viewer · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Code Diff Viewer The diff viewer uses Monaco Editor — the same engine that powers VS Code — to show text differences side by side with both panels fully editable. Paste two versions of code, configuration, or any plain text and changes highlight instantly; edit either panel and the diff annotations update in real time without resubmitting. ## What the Diff Output Looks Like The tool compares content line by line using the longest common subsequence algorithm. Three annotation types appear: - **Deleted lines** (red background): present on the left, absent on the right - **Added lines** (green background): present on the right, absent on the left - **Unchanged lines** (no background): identical on both sides The toolbar shows total added and deleted line counts and provides previous/next diff navigation buttons. In large files this means you can jump directly between changes without manual scrolling. ## Two Ways to Use the Editor ### Compare two existing versions - Paste each version into its respective panel - Review highlighted differences line by line - Useful for code review and document proofreading ### Edit while comparing - Paste the original on the left, then edit directly on the right - Diff annotations show what you have changed so far - Useful for resolving merge conflicts and consolidating two drafts ## Syntax Highlighting Over 100 programming languages are supported, including JavaScript/TypeScript, Python, HTML/CSS, JSON/YAML, SQL, and Markdown. Language can be switched manually from the toolbar; the default is plain text mode. ## Windows vs Unix Line Endings If every line turns red even though the content appears identical, the two sides likely have different line endings. Windows uses `\r\n` and Unix/macOS uses `\n`. Normalizing line endings before pasting resolves the issue. Differences that appear to be full-file changes but are actually just line-ending mismatches are the most common false positive in diff tools. Whitespace in diffs Leading and trailing spaces count as differences. If two segments look the same but are flagged as different, check for trailing whitespace before concluding there is a real content change. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Code Diff Viewer · Z.Tools](https://z.tools/t/diff-viewer) --- --- title: Deep Fried Meme Maker · Z.Tools description: Create viral meme effects with JPEG compression and color filters url: https://z.tools/t/deep-fried-image.md site_name: Z.Tools site_url: https://z.tools file: /t/deep-fried-image.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Deep Fried Meme Maker · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Deep Fried Meme Maker The deep-fried image tool applies repeated JPEG compression passes to a photo, layered with color-channel shifting, to recreate the blocky, oversaturated look that images pick up after being shared and re-saved across social media dozens of times. It processes up to 20 images at once, outputs JPEG files, and runs entirely in the browser without uploading anything. ## How Frying Strength and Quality Interact Two parameters drive the effect: **Frying strength (iterations)**: 1–50 passes of JPEG re-encoding. At 1–5 the image still looks mostly normal. Around 10–20 you get visible blocky artifacts. Beyond 30 the image becomes heavily distorted. More iterations mean longer processing time. **Compression quality**: 1–100, where lower means more damage per pass. At the default of 50 with 10 iterations you get a noticeable but readable result. Setting quality to 10–20 and iterations to 30+ produces extreme destruction. The two interact differently: quality 50 + 30 iterations produces an even, uniform block pattern, while quality 20 + 10 iterations creates sharper high-frequency noise. Both reach similar levels of visual damage through different paths. ### Maximum fry - Iterations: 30-50 - Quality: 10-25 - Color: Green (classic deep-fried look) ### Light vintage effect - Iterations: 5-8 - Quality: 60-70 - Color: None or Yellow ## Which Color Filter to Choose The tool offers 7 color shift options: None, Green, Red, Blue, Yellow, Purple, Cyan. The color shift is reapplied at every iteration, so it compounds — more passes means stronger color bias. Green is the most recognizable "classic deep-fry" style, tracing back to how early memes degraded on low-quality image hosting. Other colors work well for single-tone editorial content. ## Batch Processing and Download Upload up to 20 images (JPG, PNG, HEIC, WebP) and all are processed with the same settings. After processing, download images one at a time or click to get all results in a single ZIP file. The result view includes a slider that lets you drag across the before/after boundary to see exactly how much the image changed. PNG and WebP transparency Transparent backgrounds are filled white during processing. All output is JPEG regardless of input format. If your image has transparent areas you want to keep, fill the background in another tool before uploading. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Deep Fried Meme Maker · Z.Tools](https://z.tools/t/deep-fried-image) --- --- title: Document Format Converter · Z.Tools description: Convert between Markdown, Word, HTML, EPUB locally in browser url: https://z.tools/t/document-converter.md site_name: Z.Tools site_url: https://z.tools file: /t/document-converter.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Document Format Converter · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Document Format Converter For more file formats (images, videos, audio, etc.), please use [File Converter](https://z.tools/t/file-converter) The document converter runs a Pandoc WebAssembly engine inside your browser to convert between Markdown, Word, HTML, EPUB, and other document formats — up to 50 files at a time. Nothing is uploaded to a server; conversion happens entirely on your device. On first load the Pandoc WASM engine downloads once and then caches, so subsequent conversions and offline use require no re-download. ## Supported Input and Output Formats **Input**: `.md` / `.markdown`, `.docx`, `.doc`, `.html`, `.epub`, `.odt`, `.rtf`, `.rst`, `.csv`, `.tsv`, `.json`, `.docbook` **Output**: `.md`, `.docx`, `.html`, `.epub`, `.odt`, `.rst`, `.csv`, `.tsv`, `.json`, `.docbook` The output list does not include `.doc` (legacy Word) or `.rtf`. If you need either of those, convert to `.docx` first, then use another tool to generate the legacy format. When batch-converting, all files share the same output format — different target formats per file are not supported in a single batch. ## What Converts Well and What Doesn't Pandoc preserves structured content reliably. The following typically survive intact: - Heading levels and paragraph structure - Ordered and unordered lists - Code blocks - Hyperlinks - Base64-embedded images The following usually require manual cleanup after conversion: - Word headers, footers, columns, and watermarks - Embedded macros or scripts - Merged table cells - Externally linked images (the link will break; only base64-embedded images carry over) For plain prose content, the Markdown ↔ DOCX ↔ HTML triangle converts with high fidelity in both directions. ### Works well - Markdown tech docs → DOCX for review - Batch Word files → Markdown for Git - HTML articles → EPUB for e-readers - CSV / JSON structured data interchange ### Use a different tool - Image, video, or audio format conversion - PDF → editable format (Pandoc cannot read PDF) - Documents where complex Word layout must be preserved exactly 100% local processing All conversions run in WebAssembly inside the browser. Files are never uploaded to any server, making this safe to use with confidential documents. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Document Format Converter · Z.Tools](https://z.tools/t/document-converter) --- --- title: Duplicate Line Remover · Z.Tools description: Remove duplicate lines with custom delimiters url: https://z.tools/t/duplicate-remover.md site_name: Z.Tools site_url: https://z.tools file: /t/duplicate-remover.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Duplicate Line Remover · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Duplicate Line Remover The duplicate remover splits text by a delimiter you choose, removes identical segments, and reports which items were duplicated and how many times each appeared. It is the fastest way to deduplicate email lists, keyword banks, log lines, or any text where repeated items need to go. ## Exact Match Only — No Fuzzy Deduplication Deduplication is byte-for-byte exact matching. These pairs are treated as distinct by default: - `Apple` and `apple` — case difference, not merged - `hello` and `hello` — trailing space matters - `，` (full-width comma) and `,` (half-width comma) — treated as different characters This is intentional: fuzzy matching would silently merge items that carry different meaning in real data. If you need case-insensitive deduplication, convert all text to one case first. ## Delimiter Syntax The delimiter field accepts escape sequences. Common values: - `\n` — deduplicate line by line (default, works for most lists) - `,` — comma-separated values - `\t` — tab-separated (TSV data) - `;` — semicolon-separated - `||` or `|` — any multi-character string works as a delimiter If the text itself contains the same character as your delimiter, it will be split incorrectly. Choose a delimiter you are confident does not appear inside individual items. ## Order and Statistics The result preserves the **first occurrence** of each unique item in its original position; all subsequent duplicates are removed. The duplicate statistics list below the output shows each removed value and its total count — useful for spotting the most repeated items in a list or identifying data quality issues. ## Output Examples ### Deduplicating a line-by-line list Input with `\n` delimiter: ``` alice@example.com bob@example.com alice@example.com carol@example.com bob@example.com ``` Output: ``` alice@example.com bob@example.com carol@example.com ``` Duplicates found: [alice@example.com](https://z.tools/mailto:alice@example.com) (2), [bob@example.com](https://z.tools/mailto:bob@example.com) (2) ### Deduplicating a comma-separated string Input with `,` delimiter: `red,blue,green,red,yellow,blue` Output: `red,blue,green,yellow` Order is preserved from first occurrence The tool keeps the position of the first time each item appears. If you need alphabetical sorting after deduplication, copy the output to a text editor that supports sort operations. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Duplicate Line Remover · Z.Tools](https://z.tools/t/duplicate-remover) --- --- title: Email Signature Generator · Z.Tools description: Create professional email signatures with customizable templates url: https://z.tools/t/email-signature-generator.md site_name: Z.Tools site_url: https://z.tools file: /t/email-signature-generator.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Email Signature Generator · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Email Signature Generator The email signature generator takes your name, job title, company, contact details, and social links and produces ready-to-paste HTML for Gmail, Outlook, Apple Mail, Yahoo Mail, and any client that accepts HTML signatures. The avatar is embedded as base64 directly in the HTML, so it will not disappear if an external image host goes offline or if the recipient's client blocks remote images. ## Choosing a Template Six templates are available, each aimed at a different communication style: ### Classic / Elegant - Balanced layout for general business correspondence - Elegant is more refined — suits consultants and senior roles ### Modern / Gradient - Strong typographic hierarchy, more contemporary feel - Gradient emphasizes brand color for higher visual identity ### Minimal - Fewest elements — good for understated professional communication ### Sidebar - Left-right split layout — cleaner when you include many fields ## What the Generated HTML Looks Like The Classic template produces an output like this: ```

Jane Smith
Software Engineer · Acme Corp
jane@acme.com · +1 555 000 1234

``` Because the avatar is a base64 data URI rather than an external URL, it survives copy-paste into any client without needing a hosted image. ## Sending a Test Email After generating, you can send a test email to verify how the signature actually renders in an inbox — including font rendering, spacing, and whether the avatar shows. This catches differences between the editor preview and what Gmail or Outlook actually produce. Test email daily limit: 5 Sending test emails requires a logged-in account. Each account can send a maximum of 5 test emails per day; the count resets the following day. ## Pasting into Your Mail Client Gmail accepts rich-text paste and typically preserves the signature layout. Outlook users often get better results pasting into the HTML source tab of the signature editor rather than the visual editor, which can strip styles. Apple Mail's paste behavior depends on whether you use Edit → Paste or Edit → Paste and Match Style — the former keeps the HTML formatting. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Email Signature Generator · Z.Tools](https://z.tools/t/email-signature-generator) --- --- title: Text Encryption Tool · Z.Tools description: Encrypt and decrypt text using AES, TripleDES, and more url: https://z.tools/t/encryption.md site_name: Z.Tools site_url: https://z.tools file: /t/encryption.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Text Encryption Tool · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Text Encryption Tool The text encryption tool encrypts and decrypts plain text using one of four symmetric algorithms — AES, TripleDES, Rabbit, or RC4. Enter plaintext and a key to get a Base64-encoded ciphertext; paste that ciphertext back with the same key and algorithm to recover the original. All computation runs in the browser; nothing is transmitted. ## Which Algorithm to Choose ### AES — recommended - US federal government standard, most widely audited symmetric algorithm - Highest security with fast speed - Default choice for almost every use case ### TripleDES — legacy compatibility - Applies DES three times — less secure than AES and slower - Only use it when integrating with an older system that requires 3DES ### Rabbit — throughput priority - Stream cipher, very fast with low resource usage - Fewer public audits than AES, but acceptable security for non-critical text ### RC4 — avoid - Multiple known vulnerabilities — do not use for new work - Only relevant for compatibility with very old systems ## Key Strength Matters as Much as Algorithm Choice All four algorithms use key derivation to turn your passphrase into an internal key. A weak passphrase like `123456` or `password` makes even AES trivially crackable via dictionary attack. - Use 16+ characters mixing letters, numbers, and symbols - Never store the key in the same location as the ciphertext - Transmit the key through a separate, secure channel ## Output Format Encrypted output is a Base64-encoded string, for example: ``` U2FsdGVkX18vLZAjnNztRaRDUdr8Mz1DIeAsrY7Q1UA= ``` Base64 contains only printable ASCII characters, so it is safe to store in JSON, pass in a URL parameter, or write to a config file. To decrypt, paste this string back, select the same algorithm, and enter the same key. Encryption is not the same as hashing Password storage must use a one-way hash (bcrypt, argon2), not symmetric encryption. Symmetric encryption is appropriate when you need to recover the original value — for example, encrypting an API key in a config file or exchanging a message that the recipient needs to read. If you only need to verify a value without recovering it, use a hash instead. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Text Encryption Tool · Z.Tools](https://z.tools/t/encryption) --- --- title: Date Calculator · Z.Tools description: Calculate dates, workdays, and intervals with holiday support url: https://z.tools/t/date-calculator.md site_name: Z.Tools site_url: https://z.tools file: /t/date-calculator.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Date Calculator · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Date Calculator The date calculator works in two modes: add or subtract a number of days from a starting date to find the resulting date, or enter two explicit dates to measure the span between them. Both modes can factor in public holidays from 200+ countries and regions to produce true working-day counts. ## How the Two Modes Differ **Calculate mode** starts from one date and moves forward or backward by a number of days you specify. The count begins from the day after the starting date — the starting date itself is not included in the tally. Results show start date, end date, total days, weekend days, holiday days, and working days. **Range mode** takes an explicit start date and end date and measures the gap. Unlike Calculate mode, Range mode counts both the start and end dates. If you are matching a contractual or legal definition of "days between two dates," confirm which convention applies before choosing a mode. ## Country, State, and City Holiday Levels Enabling the holiday option makes the working-day count exclude public holidays for the selected region. The selector cascades across three tiers — country → state/province → city — and rules from all selected levels are merged automatically. For example, selecting mainland China includes Spring Festival, National Day golden-week adjustments, and Qingming Day. In the United States you can drill down to individual state holidays on top of federal ones. Typical use: a 30-business-day deadline from 2024-03-01 in mainland China will land further out than a simple weekend filter, because Qingming Day falls inside that window. Holiday data may lag behind official announcements Make-up workday and bridge-day policies are often published only 1–2 months before the holiday. The database may not yet cover the latest schedule. For contracts, payroll, or legal deadlines, cross-check the result against the official government calendar for that year. ## Working-Day Definition The tool uses the international Monday–Friday standard. In some Middle Eastern countries the working week runs Sunday–Thursday, so working-day counts will appear inflated when those countries' holiday data is selected. Adjust manually for those cases. ### Project and contract use - Find the end date for a 60-business-day delivery window - Verify whether a contractual payment term has expired - Estimate the real end date of a development sprint ### HR and admin use - Probation-period end date (90 calendar days or 60 working days) - Count working days in a period for performance reviews - See how working days fall around a holiday block for scheduling --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Date Calculator · Z.Tools](https://z.tools/t/date-calculator) --- --- title: EVA Title Card Generator · Z.Tools description: Create Neon Genesis Evangelion-style title cards with custom text url: https://z.tools/t/eva-title.md site_name: Z.Tools site_url: https://z.tools file: /t/eva-title.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. EVA Title Card Generator · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # EVA Title Card Generator The EVA title card generator renders custom text as a BMP image styled after the iconic title cards from the Neon Genesis Evangelion anime. It is built on [itorr/eva-title](https://github.com/itorr/eva-title) and reproduces the noise, blur, and convolution effects that give the original title sequence its distinctive distressed look. Useful for video subtitle cards, fan art, and meme material. ## Color Schemes and Aspect Ratios Five color combinations are available: Black/White (the default classic look), White/Black (inverted), Black/Red (warning style), Red/White (emergency style), and Black/Yellow (caution style). Black/Red and Red/White are the two most recognizable combinations from the anime. Aspect ratios: 4:3 (classic TV), 16:9 (modern widescreen), 3:3 (square for social media), 5:4, and 3:2. ## Visual Effects Four effects can be combined freely: - **Blur** — softens edges to simulate film grain - **Noise** — adds a particle overlay for a retro distressed look - **Convolution** — applies a filter that mimics signal interference - **Type 95** — a special rendering mode that alters stroke style Noise + Blur together is the most faithful recreation of the original anime title cards. Convolution adds a different kind of noise that reads more like television interference. ## Character Matching and Font Limitations The tool uses the EVA Matisse Classic font, which covers Japanese kana, common kanji, and some traditional Chinese characters. It does **not** cover all simplified Chinese characters. When you type text the tool automatically checks whether every character is in the font set and flags any mismatches. Two options when a character does not match: - Click "Try replacing unmatched characters" — the tool auto-converts simplified Chinese to traditional Chinese, which resolves most cases - Manually substitute a similar character or rephrase in Japanese or traditional Chinese ## Output Format Output is BMP format. BMP preserves the full rendered quality without compression artifacts. If you need PNG or JPEG, convert with a screenshot or any image editor after downloading. ## Using the Built-in Examples Every template includes several pre-filled text examples. Click any example to instantly populate the fields and preview how that layout will look before entering your own text. Red highlighting marks the currently active example. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: EVA Title Card Generator · Z.Tools](https://z.tools/t/eva-title) --- --- title: Currency Converter · Z.Tools description: Convert currencies with real-time rates and trend charts url: https://z.tools/t/exchange.md site_name: Z.Tools site_url: https://z.tools file: /t/exchange.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Currency Converter · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Currency Converter The currency exchange tool shows real-time exchange rates sourced from the European Central Bank and lets you convert amounts in both directions between any two currencies. Historical trend charts cover 7 days, 30 days, 90 days, or 1 year. Rate data is cached locally for 1 hour per base currency to reduce repeated fetches — switching the base currency pulls fresh data; refreshing within the hour uses the cached version. ## Data Source and Update Frequency Rates come from the European Central Bank (ECB), updated once per working day, typically around 16:00 Central European Time. These are reference mid-rates. The difference between ECB mid-rates and what banks or exchange services actually offer is usually 0.5–2%, plus any service fee or spread. For comparison purposes the ECB rate is reliable; for actual exchange transactions, confirm the rate at your bank or exchange counter. ## Reading the Historical Chart The line chart under the currency pair shows the daily rate for the selected period. Hovering over the chart shows the exact rate for that date, expressed as "1 base currency = N target currency" with 4 decimal places. ### Short-term view (7 days / 30 days) - See the recent rate range - Identify whether the current rate is near a recent high or low - Useful before exchanging travel money ### Medium-to-long term (90 days / 1 year) - Observe trend direction - Reference for cross-border business pricing - Spot seasonal rate patterns ## Searching Currencies and Reverse Conversion The currency selector supports searching by currency code (e.g., EUR, GBP) or full name. Entering an amount on the left calculates the right side automatically. You can also type directly on the right side to reverse-calculate how much source currency you need — useful for "I have X euros, how many yen can I get?" Last update date shown at the bottom The page shows when the rates were last updated. ECB rates are not available on weekends or European public holidays, so the date may appear to lag by 2–3 days near those periods. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Currency Converter · Z.Tools](https://z.tools/t/exchange) --- --- title: EXIF Viewer · Z.Tools description: View photo metadata including camera settings and GPS location url: https://z.tools/t/exif-viewer.md site_name: Z.Tools site_url: https://z.tools file: /t/exif-viewer.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. EXIF Viewer · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # EXIF Viewer The EXIF viewer reads the metadata embedded inside image files — camera model, aperture, shutter speed, ISO, shooting time, and GPS coordinates — and displays every available tag. It supports JPEG, PNG, TIFF, HEIC, AVIF, WebP, and GIF. Everything runs locally in your browser; no image is uploaded to any server. ## What EXIF fields are actually readable The tool extracts all tags present in the file. Commonly found ones: - **Camera**: Make, Model, LensModel - **Exposure**: FNumber (aperture), ExposureTime (shutter), ISO, FocalLength, ExposureBiasValue - **Time**: DateTimeOriginal (when the shutter fired), DateTime (file modification time) - **GPS**: Latitude, Longitude, Altitude, ImgDirection (compass bearing) — only present if location was enabled when shooting - **Image**: PixelXDimension/PixelYDimension, ColorSpace, Orientation (rotation flag) - **Copyright**: Artist, Copyright - Manufacturer-specific tags: Canon, Nikon, Sony Makernotes contain additional fields not defined by the EXIF standard ## Format differences in EXIF coverage ### Full EXIF support - JPEG — most complete; the format cameras write natively - HEIC/HEIF — iPhone default format; full EXIF including GPS - TIFF — professional photography format; complete metadata ### Partial or format-dependent - PNG — stores metadata in tEXt/iTXt chunks, but camera EXIF is usually absent - WebP — can include an EXIF block; depends on how the file was created or converted - AVIF — supports metadata; content varies by encoder - GIF — only basic metadata ## Checking for GPS before sharing a photo Smartphone photos almost always contain precise GPS coordinates. Before posting to a public site or sending to someone you don't trust, drop the file here to check whether location data is present. The GPS Latitude and Longitude fields will appear in the results if coordinates are embedded. Screenshots and social media images usually have no EXIF Screenshots do not carry EXIF data. WeChat, Instagram, Twitter/X, and most other platforms strip EXIF on upload — if a photo you received shows no metadata, it likely came through one of these channels. This is expected behavior, not a tool limitation. ## Copying all extracted data After extraction, the "Copy all data" button in the top-right corner copies every field as plain text to the clipboard. This is useful for logging camera settings across a batch of photos or sharing the full metadata with someone else. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: EXIF Viewer · Z.Tools](https://z.tools/t/exif-viewer) --- --- title: Virtual Meeting Simulator · Z.Tools description: Simulate a realistic video conference with camera, mic, and screen sharing url: https://z.tools/t/fake-meeting.md site_name: Z.Tools site_url: https://z.tools file: /t/fake-meeting.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Virtual Meeting Simulator · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Virtual Meeting Simulator The fake meeting simulator generates a realistic-looking video conference interface in your browser, complete with participant tiles, a control bar, a chat panel, and a countdown timer that ends the session at a time you set. It can pull in your real camera, microphone, and screen share — or run entirely without any devices for a visual-only simulation. When the timer runs out, the browser redirects to Zoom's website. ## Setting up before starting Three fields to fill in before clicking Start: - **Meeting title** — appears in the top toolbar; set it to anything you want displayed - **Duration (minutes)** — 1 to 480 minutes (up to 8 hours); the meeting ends automatically at this point - **Participant list** — one name per line; the first name is labeled "You" and gets your camera/mic input; everyone else becomes a simulated participant with their initials as an avatar There is no limit on participant count. The grid layout adjusts automatically as names are added. ## Real device controls The buttons in the bottom control bar trigger real browser permissions: - **Microphone** — connects your actual mic and uses audio analysis to detect when you speak; your tile gets a green border and a speaking indicator - **Camera** — shows your live camera feed in your tile - **Screen Share** — switches to presentation mode: the shared screen takes the main area, other participants move to a sidebar The browser will ask for permission the first time each is used. You can use the full simulation with no permissions granted — device feeds only appear if authorized. ## How the simulated speaking works Every 2–5 seconds the tool randomly selects one virtual participant and adds a green border to their tile, simulating active speech. The selection is fully random — there is no way to script specific participants to speak at specific times. Full-screen mode Press F11 to enter browser full-screen. This hides the browser toolbar and address bar, making the interface closely resemble a real meeting client. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Virtual Meeting Simulator · Z.Tools](https://z.tools/t/fake-meeting) --- --- title: File Format Converter · Z.Tools description: Convert documents, images, videos and audio between formats url: https://z.tools/t/file-converter.md site_name: Z.Tools site_url: https://z.tools file: /t/file-converter.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. File Format Converter · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # File Format Converter File Converter handles format conversion for documents, images, video, audio, ebooks, and archives — upload a file, the tool detects its format automatically, and shows only the output formats that actually work for that input. You can convert up to 10 files at once, and the file size limit depends on your account tier. ## Supported Format Categories The available output formats are determined dynamically based on what you upload, so the dropdown only shows combinations that are genuinely supported: - **Documents**: PDF, DOC, DOCX, TXT, HTML, Markdown, RTF, ODT - **Spreadsheets**: XLSX, XLS, CSV, ODS, TSV - **Presentations**: PPTX, PPT, ODP - **Images**: JPG, PNG, WebP, SVG, HEIC, AVIF, BMP, GIF, TIFF - **Video**: MP4, WebM, AVI, MOV, MKV, GIF - **Audio**: MP3, AAC, WAV, FLAC, OGG - **Ebooks**: EPUB, MOBI, AZW3, PDF - **Archives**: ZIP, RAR, 7Z, TAR ## Credits Per Conversion Each format pair costs a different number of credits, shown beside the format name before you confirm. Video conversions and high-resolution image conversions typically cost more than document conversions. ### Document format guidance - PDF — consistent display across platforms, final publishing - DOCX — keeps content editable after conversion - Markdown — technical docs and blog drafts - HTML — direct web publishing ### Image format guidance - WebP — highest compression with transparency, best for web use - PNG — preserves transparency for icons and UI elements - JPG — photos where smaller file size matters more than sharpness - SVG — vector graphics that scale without quality loss ## Batch Conversion Constraint All files in a single batch must be the same input format. Uploading a mix of formats triggers a "multiple input formats detected" warning and disables the convert button. Each file tracks its own status independently — one failure doesn't block the others from completing. Files are uploaded to a remote server Unlike local document converters, this tool sends files to a remote processing service. Files are deleted after conversion, but avoid uploading documents with highly sensitive content. If you need local-only processing for Word, Markdown, or HTML files, use the document format converter instead. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: File Format Converter · Z.Tools](https://z.tools/t/file-converter) --- --- title: Batch File Rename · Z.Tools description: Rename multiple files with regex and pattern rules url: https://z.tools/t/file-rename.md site_name: Z.Tools site_url: https://z.tools file: /t/file-rename.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Batch File Rename · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Batch File Rename Batch File Rename reads a local folder using your browser's File System Access API, applies search-and-replace rules (including full regex) to preview the new names in real time, then generates a rename script — a `.bat` file on Windows or a `.sh` file on macOS/Linux — that you run locally to do the actual renaming. Only desktop Chromium-based browsers (Chrome, Edge, Opera) support the API this tool requires. ## Writing Search and Replace Rules The simplest usage: type what to find in the Search field, type the replacement in the Replace field, leave Replace empty to delete all matches. Enable "Use Regular Expression" for full regex support. Capture groups in the search pattern can be referenced as `$1`, `$2`, etc. in the Replace field. Common regex patterns: | Goal | Search | Replace | | --- | --- | --- | | Remove parenthesized content | `\s*$[^)]*$` | (leave empty) | | Swap prefix and number | `^(.+)_(\d+)\.(.+)$` | `$2-$1.$3` | | Add a fixed prefix | `^(.+)$` | `prefix_$1` | | Keep only the number | `^.*?(\d+).*$` | `$1` | ## Controlling What Gets Renamed The "Apply to" setting determines which part of the filename the rule acts on: - **Full filename** — rule applies to both the name and the extension, useful for case normalization or full replacements - **Filename only** — extension is untouched, useful when you want to keep `.jpg`, `.pdf`, etc. unchanged - **Extension only** — name is untouched, useful for fixing mixed-case extensions like `.JPG` → `.jpg` You can also limit the rule to only files, only folders, or only subfolders, so renaming folders doesn't accidentally affect file names and vice versa. ## Running the Generated Script After clicking "Generate Script", the file (`click-to-rename.bat` or `click-to-rename.sh`) is saved into the selected folder: - **Windows**: double-click the `.bat` file - **macOS / Linux**: run `chmod +x click-to-rename.sh && ./click-to-rename.sh` in Terminal, or double-click if your system allows it The script prints a completion message and deletes itself when finished. Preview before generating the script Check every row in the preview table — original name on the left, new name on the right — before generating the script. There is no undo after the script runs. Back up important files first if you are not certain about the rules. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Batch File Rename · Z.Tools](https://z.tools/t/file-rename) --- --- title: Genshin Voice Synthesis · Z.Tools description: Generate Genshin-style character speech from selected voice samples url: https://z.tools/t/genshin-voice-synthesis.md site_name: Z.Tools site_url: https://z.tools file: /t/genshin-voice-synthesis.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Genshin Voice Synthesis · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Genshin Voice Synthesis Genshin Voice Synthesis converts text into character-styled audio using AI voice cloning based on each character's reference recordings. Type a line, pick a character and language, and the tool generates a playable, downloadable audio file. Each synthesis is billed by character count, with a maximum of 2000 characters per request. ## Language Availability Per Character Characters have reference audio in some or all of five language options: Auto, Chinese, English, Japanese, Korean. "Auto" picks whichever language is available for that character. If a character lacks a reference recording in your chosen language, the submit button stays disabled until you switch to a supported language or character. ### Short lines work best - Single sentences or short paragraphs with proper punctuation - Under 1000 characters tends to sound more natural - Clear emotional context helps delivery ### Longer narration - Up to 2000 characters supported - Split at natural paragraph breaks, generate in segments - Tone description can guide overall pacing ## What the Tone Description Field Does The tone description is optional, up to 500 characters. Use it to pass delivery instructions like "slightly slower pace, gentle tone" or "cold, low-pitched, slightly weary." This text never appears in the generated audio — it only influences how the model interprets the voice. If left empty, the model infers tone from the text itself. ## History and Results After submitting, stay on the page and wait — generation typically takes 20–60 seconds. The audio appears directly on the page once ready, where you can preview and download it. The last 7 days of generations are available in the history panel, showing character name, language, character count, and credits used. Before submitting Not all characters have reference audio for all five languages. Confirm the language you want is available for your chosen character before writing a long script — the submit button will be disabled if it is not. Use generated audio in compliance with applicable content and intellectual property guidelines. ## Tips for Better Results - Include complete punctuation in the text — pauses and intonation are more accurate when the model can read sentence boundaries - Avoid mixing multiple languages in a single submission (e.g. Chinese and English interleaved); this can reduce voice fidelity - For very long scripts, split at dialogue paragraph breaks and generate separately, then combine - Character names and place names are best written in the character's native language --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Genshin Voice Synthesis · Z.Tools](https://z.tools/t/genshin-voice-synthesis) --- --- title: GIF Frame Extractor · Z.Tools description: Extract individual PNG frames from animated GIF files url: https://z.tools/t/gif-splitter.md site_name: Z.Tools site_url: https://z.tools file: /t/gif-splitter.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. GIF Frame Extractor · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # GIF Frame Extractor GIF Splitter extracts every frame of an animated GIF as an individual PNG image, running entirely in your browser without uploading the file anywhere. Upload a GIF and the frames appear immediately, each with its own preview and download button. ## PNG Output and Frame Order All frames are exported as PNG, preserving the original resolution and transparency channel (if the GIF has a transparent background). Frames are numbered in playback order starting from the first frame. For GIFs that use inter-frame difference optimization (where each frame only stores changed pixels), the tool reconstructs each frame into a full pixel image before exporting — so what you get is always a complete frame, not a partial diff. ### GIF types that extract well - Frame-by-frame animations (memes, pixel art) - Short looping GIFs with a low frame count - Content where you need specific keyframes - Sticker GIFs with transparent backgrounds ### Slower processing cases - GIFs over 100 frames - High-resolution GIFs with many colors - Files several megabytes in size - GIFs that use partial-update optimization ## Downloading Individual Frames The results area shows all frames in a grid. Click any frame to zoom in and inspect details. Click the download icon in the lower-left of each frame thumbnail to save it as `frame.png`. If you need all frames at once, download them individually or use your browser's batch-save feature. Memory and large GIFs Browser memory limits vary by device. GIFs with more than 200 frames or with high per-frame resolution can consume significant memory during processing, and low-RAM devices may slow down or freeze. If you run into issues, trim the GIF to a shorter segment in an image editor before uploading. ## Editing the Extracted Frames The PNG frames can be imported directly into Photoshop, GIMP, or any online GIF maker for reassembly. The typical workflow is: extract all frames → edit specific frames → recombine into a new GIF. If you only need to replace a few frames, download only those instead of exporting everything. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: GIF Frame Extractor · Z.Tools](https://z.tools/t/gif-splitter) --- --- title: GPT Image 2 · Z.Tools description: Generate stunning, prompt-faithful images with OpenAI's GPT Image 2 model. url: https://z.tools/t/gpt-image-2.md site_name: Z.Tools site_url: https://z.tools file: /t/gpt-image-2.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. GPT Image 2 · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # GPT Image 2 GPT Image 2 converts text descriptions into images, with particular strength in accurately rendering text inside the image, following layout instructions, and maintaining composition control. Output is PNG at 1024×1024 pixels by default. This makes it well suited for posters, product mockups, diagrams, or any image where the wording inside the picture needs to be readable and correctly placed. ## Quality Tiers and Credits Three quality options are available — low, medium, and high — with medium as the default. High quality maximizes prompt adherence and texture detail, making it the right choice for final deliverables or print-ready assets. Low quality is fastest and cheapest, good for quickly testing a composition idea before committing. The exact credit cost for each tier is shown in your account billing settings; high quality costs significantly more than low. ## Writing Effective Prompts GPT Image 2 handles in-image text better than most image models. When you need a poster headline, product label, or chart annotation inside the image, specify the text content explicitly in the prompt along with where it should appear. A useful prompt structure: describe the main subject, then the visual style ("photorealistic" or "watercolor illustration"), then lighting and mood, then any text that must appear and its approximate position. The prompt field supports up to 32,000 characters. ## Using Reference Images ### Good uses for reference images - Lock in a visual style (specific color palette or brushwork) - Keep a character or subject consistent across generations - Provide a composition template (e.g. rule-of-thirds layout) - Up to 16 images per request for multi-angle guidance ### Reference image constraints - Each reference image must be under 20 MB - Images are automatically resized to max 2048×2048 after upload - Very small or heavily compressed images reduce guidance quality - Reference images are optional — text prompt alone works fine ## Saving Generated Images Generated images appear in the results area and can be downloaded from there. The server only stores them temporarily — download anything you want to keep. Recent generations are also listed in the history panel. Text rendering is not perfect Even with GPT Image 2's stronger text support, long strings, small font sizes, and unusual typefaces can still produce spelling errors or garbled characters. Explicitly state the text content in your prompt and verify critical text in the output carefully before using it. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: GPT Image 2 · Z.Tools](https://z.tools/t/gpt-image-2) --- --- title: Global Holiday Query · Z.Tools description: Query and compare public holidays across countries worldwide url: https://z.tools/t/global-holiday-query.md site_name: Z.Tools site_url: https://z.tools file: /t/global-holiday-query.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Global Holiday Query · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Global Holiday Query Global Holiday Query shows the public holidays for any country in a full-year 12-month calendar view, and lets you load a second country alongside the first to see where their holidays overlap. It's useful when you need to find scheduling windows that work across two countries, or when planning travel around local closures. ## Color Coding in the Calendar Four colors carry distinct meanings in the calendar view: - **Indigo** — holidays in the primary country - **Blue** — holidays in the comparison country - **Purple** — dates that are holidays in both countries simultaneously - **Light blue background** — weekends (Saturday and Sunday) Today's date is outlined in blue. Hover over any marked date to see the holiday name, which country it belongs to, and any notes. ## Year Range and Country Auto-Detection The year selector covers the current year, one year back, and three years forward — five options total. On first load, the tool reads your browser's language setting to pre-select a country: `zh-CN` defaults to China, `en-US` to the United States, and so on. If the detected country isn't what you need, change it in the dropdown and the calendar refreshes automatically. ## Using the Two-Country Comparison ### Single country view - Leave the comparison country set to "None" - Only the primary country's holidays appear (indigo) - The right-side list shows all holidays sorted by date ### Two-country comparison - Select a second country and data loads automatically - Shared holidays appear in purple - An overlap panel below the calendar lists each overlapping date with both countries' holiday names ## Searching the Holiday List The search field above the right-side list accepts holiday names, month names (e.g. "January"), or day names (e.g. "Monday"). The search uses fuzzy matching with a tolerance threshold that allows minor spelling differences, so "Independnce" still finds "Independence Day." Data limitations Holiday data covers official national public holidays. Local or regional holidays, and moveable religious observances like Easter or Ramadan, may shift from year to year. Data for a country loads on demand — you need an active network connection. Always verify with official government sources for time-sensitive planning. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Global Holiday Query · Z.Tools](https://z.tools/t/global-holiday-query) --- --- title: GitHub Star History · Z.Tools description: Visualize star growth trends of GitHub repositories over time url: https://z.tools/t/github-star-history.md site_name: Z.Tools site_url: https://z.tools file: /t/github-star-history.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. GitHub Star History · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # GitHub Star History GitHub Star History visualizes the cumulative star growth of any public repository as a line chart, fetching the complete star history through the GitHub API, aggregating by month, and exporting the result as an 800×470 PNG. If you want to show a project's growth trajectory in a report or social post, this is a direct way to do it. ## Why You Need a Personal Access Token GitHub limits unauthenticated API requests to 60 per hour — enough for small repos, but a repository with a few hundred stars will exhaust that budget quickly. Adding a Personal Access Token (PAT) raises the limit to 5000 requests per hour. To get a token: GitHub account → Settings → Developer settings → Personal access tokens → Tokens (classic) → Generate new token. You don't need to check any permission scopes — public repository data requires none. The token is only used in your browser and never sent to this site's servers. ## URL Format Requirements The input field accepts `https://github.com/owner/repo` format only. A trailing slash or any sub-path will trigger an error: - `https://github.com/Ice-Hazymoon/MikuTools` — valid - `https://github.com/Ice-Hazymoon/MikuTools/` — invalid (trailing slash) - `https://github.com/Ice-Hazymoon/MikuTools/issues` — invalid (sub-path) ## How the Chart Data Works ### Data aggregation - Stars are grouped by month; each point shows the cumulative total at month end - Horizontal axis uses year labels; vertical axis auto-scales to K/M units - Hover on the line to see the specific month and count ### Export specs - Fixed width 800px, aspect ratio approximately 1.7:1 - White background — embeds cleanly into light or dark documents - Filename automatically includes the owner and repo name ## Query Time Reference The more stars a repository has, the more paginated API requests are needed. A repo with a few thousand stars and a valid token typically loads in 10–30 seconds, with a live progress percentage shown on screen. Very large repos with tens of thousands of stars can take over a minute. Rate limits and private repos Private repositories require a token with read access to that repo. If you query several large repositories in quick succession, you can still approach the 5000-request hourly cap, which triggers a GitHub rate-limit error until the window resets. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: GitHub Star History · Z.Tools](https://z.tools/t/github-star-history) --- --- title: GPU Ranking · Z.Tools description: Compare and rank GPU performance url: https://z.tools/t/gpu-ranking.md site_name: Z.Tools site_url: https://z.tools file: /t/gpu-ranking.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. GPU Ranking · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # GPU Ranking GPU Ranking aggregates graphics card benchmark scores into a searchable, sortable table where you can select multiple GPUs and compare them side by side. The percentage column tells you how far each card sits from the top-ranked GPU, which is often more useful than raw scores when deciding whether an upgrade is worth it. ## Reading the Table Columns Three columns appear in the ranking table: model name, absolute score, and percentage. The percentage uses the top-ranked GPU as 100% and scales everything else proportionally — so if a card shows 62%, it delivers roughly 62% of the top card's benchmark performance, regardless of where scores happen to fall on the raw scale. The score column is sortable by clicking the header. ## Multi-Card Comparison Check a GPU in the table to add it to the comparison panel at the top of the page. You can add as many as you want, and each shows its score and a percentage progress bar for quick visual comparison. Click the remove button next to any entry to drop it, or use the "Clear" button to reset everything. The panel has no hard cap, but 4–6 cards is a practical limit before the layout gets crowded. ### What benchmark scores can tell you - Relative gap between your current card and a candidate upgrade - Rough tier position for content creation workloads like video rendering - Quick shortlisting when standardizing hardware across a team ### What benchmark scores cannot replace - VRAM capacity (critical for 4K gaming and large model inference) - Power draw and system thermal constraints - Driver compatibility with specific software or OS versions - Frame pacing and stability under sustained real workloads ## Filtering by Model Name Type a keyword into the search field to filter — "4090", "RX 7900", "3080 Ti", etc. The table updates in real time. Clear the field to show all results again. Data freshness Benchmark data comes from third-party aggregation sources. Newly released cards may take time to appear in the database. Synthetic scores reflect general graphics throughput and should be cross-checked against workload-specific benchmarks before finalizing a purchase decision. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: GPU Ranking · Z.Tools](https://z.tools/t/gpu-ranking) --- --- title: Text Hash Generator · Z.Tools description: Generate MD5, SHA, SHA3 and RIPEMD hash values url: https://z.tools/t/hash-text.md site_name: Z.Tools site_url: https://z.tools file: /t/hash-text.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Text Hash Generator · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Text Hash Generator Hash Text calculates eight different hash values for any input text simultaneously, updating all results in real time as you type. It supports MD5, SHA1, SHA224, SHA256, SHA384, SHA512, SHA3, and RIPEMD160, all computed locally in your browser. Each result line has a one-click copy button. ## Same Input, Very Different Outputs To illustrate the length difference between algorithms, here is `hello world` hashed in several formats: ``` MD5: 5eb63bbbe01eeed093cb22bb8f5acdc3 (32 hex chars) SHA1: 2aae6c69bc0b4ab6db7f39be3e... (40 hex chars) SHA256: b94d27b9934d3e08a52e52d7d... (64 hex chars) SHA512: 30d8ac7... (128 hex chars) RIPEMD160:98c615784ccb5fe5936fbc0cbe... (40 hex chars) ``` The avalanche effect means even one character difference produces completely unrelated output: `hello world` and `hello World` share zero similarity in their SHA256 values. ## Which Algorithm to Use ### Suitable for security use - **SHA256** — general default for digital signatures, blockchain, integrity checks - **SHA512** — higher collision resistance when extra security margin matters - **SHA3** — built on a different design principle than SHA-2 (Keccak); good for future-facing applications ### Non-security use only - **MD5** — fast file integrity checks, cache keys, non-security unique IDs - **SHA1** — legacy system compatibility (Git object IDs, older protocols) - **RIPEMD160** — Bitcoin address generation (used alongside SHA256) ## Passwords Are Not Safe with These Algorithms Hashing a password with MD5 or any SHA variant is not a secure storage strategy. Rainbow table attacks can reverse common passwords in seconds when only a plain hash is stored. Password storage requires a salted, slow hash function designed specifically for that purpose — bcrypt or Argon2 — not the general-purpose algorithms this tool provides. MD5 and SHA1 have known collision vulnerabilities Both MD5 and SHA1 have demonstrated collision attacks — meaning two different inputs can produce the same hash. Do not use them for digital signatures, certificate validation, or anything where collision resistance matters. SHA256 or stronger should be the minimum for security-sensitive contexts. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Text Hash Generator · Z.Tools](https://z.tools/t/hash-text) --- --- title: Number Base Converter · Z.Tools description: Convert numbers between binary, hex, decimal and more url: https://z.tools/t/hex-converter.md site_name: Z.Tools site_url: https://z.tools file: /t/hex-converter.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Number Base Converter · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Number Base Converter Number Base Converter converts any integer between bases 2 through 62, displaying all supported base results simultaneously as you type — no button press needed. The ten preset bases are: 2, 8, 10, 16, 26, 32, 36, 52, 58, and 62. ## Character Sets Used Per Base The alphabet is `0–9` then `a–z` (lowercase) then `A–Z` (uppercase) — 62 characters total. Each base takes the leading prefix of this set, with some exceptions worth knowing: - **Base 16** — uses `0–9a–f` (lowercase only) - **Base 26** — uses digits and uppercase letters but excludes I, L, O, U to reduce ambiguity - **Base 58** — excludes 0, O, I, l; this is Bitcoin's standard address character set - **Base 62** — all 62 characters; highest encoding density, common for short URL IDs ## Conversion Examples Using decimal `114514` as input: ``` Binary (2): 11011111101110010 Octal (8): 337362 Decimal(10): 114514 Hex (16): 1bf72 Base 58: Q4E Base 62: Pl0 ← only 3 chars; popular for short link IDs ``` For hex color `ff5733` (decimal 16734003), to get the RGB components you convert each two-digit segment separately: `ff` → 255, `57` → 87, `33` → 51, giving RGB(255, 87, 51). ## Common Uses Per Base Group ### Computing and development - Binary — bit manipulation, digital logic, permission flags - Octal — Unix file permissions (e.g. 755 = rwxr-xr-x) - Hexadecimal — memory addresses, color codes, hash display ### Encoding and identifiers - Base 62 — short link IDs, compressed database auto-increment IDs - Base 58 — Bitcoin addresses, IPFS hashes - Base 32 — URL-safe identifiers, case-insensitive - Base 36 — short URLs, compact readable identifiers Precision limit for large numbers The tool uses JavaScript number arithmetic. Numbers larger than 2^53 − 1 (approximately 9,007,199,254,740,991) will lose precision. For cryptographic hashes, blockchain addresses, or other very large integers, use a dedicated big-integer library instead. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Number Base Converter · Z.Tools](https://z.tools/t/hex-converter) --- --- title: Image Steganography · Z.Tools description: Hide and extract secret text in images with password protection url: https://z.tools/t/hide-text-to-image.md site_name: Z.Tools site_url: https://z.tools file: /t/hide-text-to-image.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Image Steganography · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Image Steganography Hide Text to Image embeds secret text into an image's pixels using LSB (least significant bit) steganography, and can also extract hidden text from a processed image. An optional password scrambles the embedding positions so the text can only be read back with the correct password. All processing runs locally in your browser — the image is never uploaded anywhere. ## How Strength Levels Affect Capacity and Visibility The level setting (0–5) controls how many bits per pixel channel are used to store data. Level 0 uses the fewest bits — smallest capacity, changes nearly invisible. Level 5 uses the most bits — higher capacity, but on solid-color or gradient areas faint noise may be visible to the naked eye. Level 3 (default) is the recommended balance. ### Choosing a level - Levels 0–2 — maximum stealth, suitable for short text (under a few dozen characters) - Level 3 (default) — moderate capacity, works for typical messages - Levels 4–5 — hide longer text; faint noise possible on plain or gradient areas ### Password protection - Password scrambles the bit embedding positions - Without the correct password, extraction produces garbage output - Forgetting the password means the hidden text cannot be recovered - Without any password, anyone using the same level can extract the text ## Capacity Is Limited by Image Pixel Count The amount of text an image can hold is proportional to its total pixel count. A 100×100 pixel image (10,000 pixels) can only store a few hundred characters even at the highest level. If you need to hide a long message, use a larger image as the carrier. ## Why the Output Must Stay as PNG The output file is always PNG. If you re-save it as JPEG, convert the format, or share it through a platform that re-compresses uploads (social media, messaging apps), the LSB data is destroyed and extraction will fail. Transfer the PNG file directly without any intermediate processing. Never re-process the output image Cropping, resizing, re-compressing, or converting the format after hiding will irreversibly destroy the embedded data. Do not open the output in an image editor and save again before extracting. The tool accepts PNG, JPEG, and WebP as input. All Unicode is supported, including emoji and multi-byte characters. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Image Steganography · Z.Tools](https://z.tools/t/hide-text-to-image) --- --- title: Grammar Checker · Z.Tools description: Check English grammar with smart corrections and multi-dialect support url: https://z.tools/t/grammar-check.md site_name: Z.Tools site_url: https://z.tools file: /t/grammar-check.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. Grammar Checker · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # Grammar Checker English Grammar Check analyzes English text in your browser using a WebAssembly grammar engine, detecting spelling, capitalization, punctuation, repeated words, subject-verb agreement, writing style, and readability issues in real time. It supports four dialects — American, British, Australian, and Canadian — and all text processing happens locally, never sent to a server. ## Error Types and Their Colors Each problem category gets a distinct underline color so you can spot the issue type at a glance before clicking: - **Red** — spelling: wrong letters or typos like "teh" for "the" - **Dark purple** — capitalization: missed sentence-start capitals, proper noun casing - **Orange** — punctuation: comma, period, quotation mark issues - **Teal** — repeated words: consecutive duplicates like "the the" - **Yellow** — writing style: suggestions for more concise or accurate phrasing - **Green** — readability and word choice: sentence structure optimization - **Blue** — agreement: subject-verb, tense, and related grammar rules Click any underlined text to see the issue description and correction options. Each suggestion is one of three action types: delete (remove excess content), replace (swap with the correct form), or insert (add missing content at the right place). Clicking applies the correction immediately. ## Dialect Differences ### American English (default) - Spellings: color, organize, analyze, center - Punctuation inside quotation marks (American convention) - Best for content aimed at North American audiences ### British / Australian / Canadian - Spellings: colour, organise, analyse, centre - Canadian English blends British and American patterns - Switching dialects triggers an immediate re-check ## What the Checker Won't Catch The grammar engine focuses on standard English conventions. It will flag technical jargon, brand names, and deliberate non-standard constructions as errors. Intentional comma splices, unconventional capitalization (like brand names written in lowercase), or dialect-specific idioms may also be marked. Treat every suggestion as an option, not a mandate. First-load initialization On the first use in a session, the tool initializes the WebAssembly module locally. This takes a few seconds but is a one-time cost — all subsequent checks in the same session run instantly and fully offline. --- *[Z.Tools](https://z.tools) — Free AI Tools Hub for Everyone—no ads, no signup, just click and use.* [Browse all tools](https://z.tools/explore) | [Source: Grammar Checker · Z.Tools](https://z.tools/t/grammar-check) --- --- title: HTML to Markdown · Z.Tools description: Convert HTML to Markdown with customizable formatting options url: https://z.tools/t/html-to-markdown.md site_name: Z.Tools site_url: https://z.tools file: /t/html-to-markdown.md --- > **[Z.Tools](https://z.tools)** — Free AI Tools Hub for Everyone—no ads, no signup, just click and use. HTML to Markdown · Z.Tools [![logo](https://z.tools/logo/global/logo.png) Home](https://z.tools/ "Home") 0 Tools Search - [All Tools All Tools](https://z.tools/) - [Explore Explore](https://z.tools/explore) - [Favorites Favorites](https://z.tools/favorites) Send Feedback Claim free credits # HTML to Markdown HTML to Markdown converts HTML code or uploaded `.html`/`.htm` files (up to 10 MB) into Markdown text using Turndown.js. Paste a snippet or drop a file, adjust the format options, and copy or download the result as `converted.md`. The conversion runs entirely in your browser — nothing is sent to a server. ## What converts cleanly vs. what needs manual cleanup ### Converts reliably - Paragraphs and H1–H6 headings - Ordered and unordered lists, including nested - Code blocks ( `

` and ``)
- Inline links and image references
- Blockquotes ( ``)

### May need manual adjustment

- Tables with merged cells (colspan/rowspan not supported)
- Deeply nested lists (indentation can shift)
- Embedded images (converted to `![alt](src)` but path depends on original domain)
- Inline styles inside `` (all CSS is stripped)

## Format options that actually matter

The "Conversion Options" panel has ten settings. Defaults work for most cases, but these three are worth adjusting:

- **Heading style**: `atx` (uses `#` prefixes) has broader compatibility than `setext` (which only applies to H1/H2 using `===`/ `---` underlines). Use `atx` unless you have a specific reason not to.
- **Code block style**: `fenced` (triple backticks) supports syntax-language annotations; `indented` (four spaces) is plain but always valid.
- **Link style**: `inlined` keeps the URL next to the text; `referenced` moves all URLs to a reference list at the end — useful for long articles where inline URLs clutter reading.

## What happens to scripts, styles, and modern HTML elements

`